Add apache URL encoder

* see #504 :

* update guava to have access to UrlEscapers
* add function in morph to encode item
* add morph function description
* add schemata used to include morph function
* update test file
Rename "apache-urlencode" to "urlescaper"
Rename URLEscaper to UrlEscaper
Change way of closing silently because newer old method is deprecated
Change library to encode Uris

See also #517

* add encoding of characters '+' and '/' to savely use
	URIs as whole URL and as URL query
Remove guava library because it's part of used gdata library
Merge pull request #505 from lobid/issue-504-uris-encoding

Add URLEscaper